Detections
Analytics
CVE-2026-1609
high
Description
A flaw was found in Keycloak. When the JSON Web Token (JWT) authorization grant preview feature is enabled and a user account is disabled, Keycloak fails to validate the user’s disabled status during JWT authorization grant processing. A remote attacker with low privileges can exploit this improper access control vulnerability by presenting a valid assertion token from an external identity provider to obtain a JWT for a disabled user. This allows unauthorized access to sensitive resources.
References
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-1609.json
https://github.com/keycloak/keycloak/releases/tag/26.5.3
https://github.com/keycloak/keycloak/issues/46144